7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

Search for intermediate states in the rare earth nucleus <sup>150</sup> Sm

8 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: B.127
Poster Presentation Track B - Nuclear, Particle and Radiation Physics Poster1

Speaker

Mr Lumkile Msebi (University of Johannesburg)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

MSc

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

In nuclear science, things that may seem trivial such nuclear shape, size, collective and individual motions of nucleons give very useful information about the structure of the nucleus.Quantum numbers are important in nuclear science since they are characteristic of excited states and how they decay to other states [1]. The collective motion of the nucleus can either be vibrational or rotational.The collective motion of the nucleus can either be vibrational or rotational. When the collective motion changes from vibrational to rotational rapidly the nucleus is said to be in the transitional region [2]. The N=88 rare earth neutron rich nuclei lie in this region. 150Sm is one such nucleus and it is the focus of this work. The low lying 02+ state of 150 Sm has octupole correlations that is related to the low lying negative parity states K&pi =0- [2]. Studies have already been done on the lower states of the nucleus 150 Sm with the150 Nd(&alpha,2n) 150 Sm reaction at 25 MeV, a self-supporting target of 5 mg cm-2, and the Jyväskylä JUROGAM II escape-suppressed &gamma –ray spectrometer array [3] consisting of 24 clover and 15 tapered HPGe detectors all in BGO shields. We also studied the higher spin states using the136 Xe (18 O, 4n) 150 Sm reaction at 75 MeV using the iThemba LABS AFRODITE spectrometer employing a cryogenic frozen xenon target.
We report our findings on the experiment that was performed recently at iThemba LABS using the reaction150 Nd (4 He, 4n) 150 Sm and the AFRODITE array spectrometer with the digital electronics. The specific focus of this work is on the structure and deformation of the intermediate spins of 150Sm and to gain insight on the collective and quasi-particle structures of 150 Sm.

[1] Ntshangase SS DEVELOPMENT OF A RECOIL DETECTOR AND THE STUDY OF EXOTIC ASYMMETRIC SHAPES IN NUCLEI (PhD Thesis, University of Cape Town)
[2] Bvumbi S P Investigation of octupole correlations and collective
couplings in the rare earth nucleus (PhD Thesis, University of Johannesburg)
[3] www.jyu.fi/research/accelerator/nucspec/jurogam

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Main supervisor (name and email)<br>and his / her institution

Suzan Bvumbi, University of Johannesburg, suzan@tlabs.ac.za

Primary author

Mr Lumkile Msebi (University of Johannesburg)

Co-authors

Mr J.F Sharpey-Schafer (iThemba Labs) Dr L.P Masiteng (University of Johannesburg) Mr Pete Jones (iThemba Labs) Ms S.P Bvumbi (University of Johannesburg) Mr SNT Mjola (iThemba Labs)

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